865072 has 20 divisors (see below), whose sum is σ = 1805440. Its totient is φ = 399168.

The previous prime is 865069. The next prime is 865087. The reversal of 865072 is 270568.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 865072.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1872 + ... + 2287.

It is an arithmetic number, because the mean of its divisors is an integer number (90272).

2⁸⁶⁵⁰⁷² is an apocalyptic number.

It is an amenable number.

865072 is an abundant number, since it is smaller than the sum of its proper divisors (940368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

865072 is a wasteful number, since it uses less digits than its factorization.

865072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4180 (or 4174 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 865072 is about 930.0924685213. The cubic root of 865072 is about 95.2834379011.

The spelling of 865072 in words is "eight hundred sixty-five thousand, seventy-two".